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| author | Santosh Shilimkar <santosh.shilimkar@ti.com> | 2014-02-24 16:32:59 +0100 |
|---|---|---|
| committer | Santosh Shilimkar <santosh.shilimkar@ti.com> | 2014-05-08 21:43:33 +0200 |
| commit | 14f3791439b5a6cf12127fb80204265533d92664 (patch) | |
| tree | 28059b8ce76be2b98bb4a914d16cc39289dffc52 /arch/arm/mach-keystone | |
| parent | ARM: keystone: Switch over to coherent memory address space (diff) | |
| download | linux-14f3791439b5a6cf12127fb80204265533d92664.tar.xz linux-14f3791439b5a6cf12127fb80204265533d92664.zip | |
ARM: keystone: Update the dma offset for non-dt platform devices
Tested-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Diffstat (limited to 'arch/arm/mach-keystone')
| -rw-r--r-- | arch/arm/mach-keystone/keystone.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/arch/arm/mach-keystone/keystone.c b/arch/arm/mach-keystone/keystone.c index 155eb062e8d1..59b8383cbdb0 100644 --- a/arch/arm/mach-keystone/keystone.c +++ b/arch/arm/mach-keystone/keystone.c @@ -31,6 +31,27 @@ #define PLL_RESET BIT(16) static void __iomem *keystone_rstctrl; +static struct notifier_block platform_nb; +static unsigned long keystone_dma_pfn_offset __read_mostly; + +static int keystone_platform_notifier(struct notifier_block *nb, + unsigned long event, void *data) +{ + struct device *dev = data; + + if (event != BUS_NOTIFY_ADD_DEVICE) + return NOTIFY_DONE; + + if (!dev) + return NOTIFY_BAD; + + if (!dev->of_node) { + dev->dma_pfn_offset = keystone_dma_pfn_offset; + dev_err(dev, "set dma_pfn_offset%08lx\n", + dev->dma_pfn_offset); + } + return NOTIFY_OK; +} static void __init keystone_init(void) { @@ -45,6 +66,8 @@ static void __init keystone_init(void) pr_warn("ti,keystone-reset iomap error\n"); keystone_pm_runtime_init(); + if (platform_nb.notifier_call) + bus_register_notifier(&platform_bus_type, &platform_nb); of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); } @@ -88,6 +111,9 @@ static void __init keystone_init_meminfo(void) /* Populate the arch idmap hook */ arch_virt_to_idmap = keystone_virt_to_idmap; + platform_nb.notifier_call = keystone_platform_notifier; + keystone_dma_pfn_offset = PFN_DOWN(KEYSTONE_HIGH_PHYS_START - + KEYSTONE_LOW_PHYS_START); pr_info("Switching to high address space at 0x%llx\n", (u64)offset); } |